Mechanical stoker.



E. H. PEABODY.V MECHANICAL STOKER. APPLIUATION FILED A1=1z.,'1so.

Patented Julyl 23, 1912.

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E. H. PEABODY. MECHANICAL STOKBB. APPLIoATvIoN FILED APR. s, 190e.`

Patented July 23, 1912.

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UNITED STATES PATENT j oEEIcE.

ERNEST H. EEAEODY, OE NEWYORK, N. Y. ,.AssI GNoR 'ro THE BABoooir a wrfoox COMPANY, OE BAYONNE, NEw JERSEY, A CORPORATION or NEW JERSEY.

MECHANIGAL STOKER.

VSpecication of Letters Patent. l Patented July 23, 1912.

Application ledApril 6, 1906'. Serial No. `310,276.

To all whom #may concern;

Be it known that I, ERNEST H. PEABODY,

av citizen of the United' States, residing at' New York city, inthe county of New .York v'and State of New.York, have invented certain new and "useful Improvements in-Mechanical Stoke'rs, of which the following is a specificatiom reference being had therein to the accompanying drawing.

My invention relates to mechanical stokers and it consists of certain novel parts aud combinations of parts severally 'specically claims concluding this The following is a "description of alstruc? ture involvingthe several features of my;

invention intheforms which are at present preferred bygne but it will be understood that various modifications and changes may be made in the mechanism without-departing from the spirit of my invention andi Scope of my several f l 11 `'and chain grate 7 in or out, therebyde- .creasing` or increasing the size of the openwithout exceeding the claims.n

In the accompanying drawings forming Yl a part of this specification the lnventlon 1s E illustrated 1n association with a furnace of i a 'water tube steam generator, in which- Figure '1 showsa part'of aboiler furnace in section and a Side View of a chain grate Stoker wlth a mechanism for operating .and

adjusting the same. Fig. 2 is a front elevation of the stoker. Figs. 3, 4 and 5 are. partial and enlarged Side views showing the varying position of the chain links and relativedlcation of thelinks with the adjacent part of the boiler structurev whereby the clinkers are crushed by the continually advaneing links. Fig. 6 is a detail section showing 'the open position ofthe device used for locking the stoker in adjusted positionV in the furnace. Referring to the drawings in which the corresponding parts in the figures are'indicated by the same numerals, the stoker comprises a 'chain grate composed of pivoted grateV links 8.'mountedon sprocket wheels, and rollerslO connected with a. frame 11 and which is supported by four truck I wheels 12 running on railsv to facilitate the withdrawal 'from lor the insertion. of the Stoker-1n the furnace. This Stoker when in- Serted `in the furnace isheld and locked- .theremi and rendered adjustable so as to vary the size ofthe opening at the discharge end',v of the Stoker between the traveling grate links 8 lmd an adjacent part of the boiler, as thewater box 13. The adjusting mechanism comprises the racks 14h-14, se-

cured to the hopper attached to the furnace front and which engage with thel worms or screw-threads 1515, located at the forward or outer end vofthe Stoker and arranged ir `sets on eachside of lthe Stoker, and which arejonnected together by pairs of =bevel gears 16-16 and a front shaft 17 which is provided, with a hand-wheelv .18 f or the simultaneous and equal adjustment of both Sides of the. grate as'shown in Fig.' 2. The

Worms 15-15 are right and left threaded. respectlvely, and not only adjust the fra-me .i4-14 out of engagement with the worms lefl, as Shown in thel detail section, Fig. G, in which position the stoker is free to be moved inor out; The racks 14 are supported in brackets on the side of the hopper and are capable of being turned out of engagement'with the'worm-s 15 by a wrench applied to the heads 32 at the forward ends of the racks. The front wheels of the truck or frame 11 are' provided with slots or groo'ves 19 for the insertion of turning bars.

In Fig. 1 the top lineof the grate link 8 is 'in line with the edge 20 of the 4boiler water box 13, and is adaptedfor coal from which small clinkers' are formed, while `in Figs. 3, 4 and 5 (shown enlarged). thetop clinkers are located Y of the flat 'line of the linkA is shown located below the clinker breaking edge of the water boX and which is bettersuited in the use of large `clinker forming coal'. In both cases the clinker-breaking .edge is located rearwardly surface of. the grate. -When between the advancing edge of the 'grate link 8 (Fig. 3) andthe edge 2O of the water-box, they are crushed or broken by the reduction of the distance lbetween these parts in the advancingmovement of the grate links and undergoa repeated crushing by the action of the links and resisting surface of the water-box.

The amount of fuel lfed to the grate de pends upon the speed ofthe grate and upon the adjustment of the'opening ofthe disl door of the hopper whichv admits `more or less fuelto the grate.

charge With the mechanism shown, the travel of the grate is leffected bythe following means. A screw 22 is ,supported in a frame 33 pivoted on the shaft of a ratchet wheel l26, said frame carrying a pawl 25 engaging the teeth of said wheel. On'theshaft of wheel 26 is a beveled gear 27 meshing with a similar gear latter meshes vwith a large worm wheel 29 the feed opening from to the shaft of which issecured a sprocket wheel 30 which engages with 'the links ofil the lchain grata 'The screw 22 passes through a threaded head pivoted to the end of a rod 84 to which a reclprocating motionv is imparted by any suitable mechanism. Gwing to such reciprocating movement the frame 33 `will effect an intermittent rotation of ratchet wheel 26 by means ofl awl 25 and, through .the train of mechanism described, a movement of the chain grate. Then it is desired to vary the rate of travel 4of the grateit may be done by turning the -large enough to take care of the largest clinker that will be formed and it is, therefore, very wasteful of combustible material, for a considerable quantity of combustible matter is lost with the refuse and also an excess 'of air is allowed to flow through the bed of fuel atthe rear. By restricting the size of the' discharge opening, as hereinbefore described, the fuel is banked up at the discharge end, thereby' arrestingfuel which on theshaft ofa worm 28. The

has not been-entirely consumedand affording, `time for complete combustion before it isdischarged.` The cake of clink'er is forced down upon the 'grate links by the weight of fuel above it ,and vis broken up by the adr vancing movement of the grate links before it enters the dischargeopening and is thereg by reduced to a;y size whrchwill readily pass therethrough."`

Different grades of coal form clinkers ofl different size and lquantityhand it isitherefore desirable, in order to'etfectxthe advantage'ous-'results above set forth, `to provide means for varying the; size of the discharge opening, which means are afforded by the mechanism above described. l f

What I claimand desire to secure by Letters Patent is l. In a furnace in which the fuel Vis caused to travel within the combustion chamber, a grate, an abutment at the rear of and in proximity to said grate to provide a restricted 'and meansjformoving said grate and abutment relatively to each p'ther to produce aA crushing action on the clinkers previous to passingthrough said outlet.

2. In a mechanical Stoker, the combination of a traveling grate of the link type, tan' .abutment locatedrearwardly of and in close proximity to the fiat surface of the grate, whereby when the links reach the rear end of the grate the fuel-bearing surface thereof will be swung in the direction `of the abutment thereby producing a crushing action on the clinkers, and means for `supplying fuel to the grate.

outlet for the ash l\and fuel refuse, A

In a mechanical stoker, the combination of a traveling grate of the link type, an abutment located rearwardly of and in close proximity to the fiat surface of the rgrate and in substantially the same plane thereof, whereby when the links reach the rear end of the grate the fuel-bearing surface thereof will be swung in the direction of the abutment thereby producing a crushing action on the clinkers, and means for supplying fuel to the grate.

4. The combination with a furnace structure, of a traveling grate so located with respect toa part or element of the furnace as to provide a restricted outlet for the ash or fuel refuse, the grate bearing such a relation to-said part or element as to crush the.

clinkers passing through the outlet, and means for adjusting said grate with respect to said part or element.

5. In a mechanical Stoker, the combination of a traveling grate, an abutment located rearwardly ofthe flat surface ofthe grate whereby a discharge opening is formed between the grate nd abutment, the grate bearing such relation to said abutment as to crush the clinkers passing through the 1,033,192 l gg discharge opening,fmeans foi' longitudinally-| and to crush the clinkers passing through adjusting said grate, and means for supplying fuel to the grate.

G.' The combination with a fu'i'nn 5 ture, of a traveling grate so located spcet to :L part or element of the furnace as to piovlde a restrlcted outlet for the ash or fuel refuse, the grate beau-ing such a rela,-

tion to said pzu't o1' element as to 10 banking of the fuel at the discharge end Copies Vo1! this patent mey be' obtainedlfo the outlet, and means for adjusting said grate with respect to said putt or element.'

In testimony whereof I ul'lix my signature in presence of two witnesses.

ce stiucwith reitnesses N. E. Lnu'is,

Jol-IN A. W. DlxoN.

r ve cents cach, by addressing the Commissioner v-Patents l Washington," D. C. 

